Shock-absorber



S. MUNSON. lSHOCK ABSORBER. AHIIICAYION Fl-LED APRAZG, 1919.

' Patented Mar. 1920.

`citizen of the United States7 residing at Fowler, in the county of Otero and State of' UNITED sfrATEs PATENT oEErcE.

IVIU'NSOINJ OF FOWLER, COLORADO.

sHocK-AiasOEBER.

Speccation of Letters Patent.

Patented Mar. 9, 19.20.

Application filed April 26, 191.9. Serial 110.292,873.`

T0 all whom t may concern.'

B'e it known that I, SWENEY MUNsoN, a

Colorado, have invented a certain new and useful Improvement in Shock-Absorbers, of which the following is a specification.

My invention relates to improvements in shock absorbers. It relates particularly to a shock absorber adapted for'use on the rear aXle of an automobile. v

The object of my invention is to provide ay shock absorber which is simple in construction, strong and durable, not liable to get out Aof order, which may be readily lapplied by an unskilled person to an automobile, which is cheap to manufacture, and `which will serve to snub thevrebound as well as to absorb shocks due to the downward movement of the frame of the machine.

A furtherobject of my invention is to provide a shock absorber which permits movement of the frame in any direction relatively to the aXle or aXle casing.

Still another object of my invention is the provision of novel self lubricating dash-pot Still another object of my invention is to provide a novel dash-pot which serves as a shock absorber on the downward movement' of the piston and as a snubberon the upwardv movement vof the piston, vbut in which there is less resistance to the upward movement than to the downward movement of the piston. Q f

My invention provides still further a-dashot vin which the pressure is evenly distributed over the upper and lower sides of the head of the piston.

Other novel features of'my invention are hereinafter fully described and claimed.

In the accompanying drawing which illusy trates the preferred embodiment of my invention,

Figure l is a view partly in side elevation and partly in vertical section of my improved shock absorber sh-own attached to the frame and aXle casing, portions of which are shown., of an automobile. I

Fig. 2 is a rear elevation of what is shown in Fig. 1, the channel bar of the frame being shown in. cross section.

Fig. 3 is a cross section on the line 3--3 of Fig. 1.

` channel bar l of the frame.

FF ig. 4 is across section onthe line of iig.

Similar reference characters vdesignate similar parts in the different` views.

1 designates a channel bar which forms part of a frame of an automobile', and 2 designates the rear aXle casing. 3 designates an upright dashpot cylinder having a screwthreaded upper end, on which is fitted a cap 4 which is provided with a central hole in which is longitudinally slidably ftteda pis,- ton rod 5 having a shouldered screwthreaded lower end, on which is fitted a pislton head 6, which is slidably fitted in the cylinder 3,and whichma be provided with the usual peripheralpac ring ring 7. The head 6 is provided on its upper side withl a raised portion 8, which preferably encircles the piston rod 5, and throughwhich extend two diametrically opposite vertical holes 9, prferably located closely adjacent to the ro The upper side of the head 6 is provided with a1 depressed portion 10, encircling the raised portion 8 and extending to the periphery of the head. Said depressedportion 10 is adapted to contain a lubric such as oil l1, which serves to keepthe pe riphery of the head 6, "packing ring 7, and upper inner wall of the cylinder 3 well lubricated, even at such times as the machine is running on smooth roads and the head does not enter the oil 12, which is located in the cylinder below the head 6 and normally separated therefrom by an air space.

The cap 4 is provided with one or more holes 13 extending vertically therethrough.

When two holes are provided, they are, prefball head 14, provided centrally at the under side of the lower end'of the cylinder, two clamping vokes 15 and 16, comprising socket members, each having on its inner side a. socket in which -the ball head 14 is pivotally mounted. Bolts 17, each provided with a nut 18 extend through the socket members 15 and 16 andhold the lattertogether embracing the ball head 14, the bolts 17 being disposed at opposite sides of said ball head.

The socket members or clamping yokes 15 and 16 are bifurcated and embrace and are supported by the upper side of the axle casing 2. The downwardly extendingl arms of the members 15 and 16 extend through a horizontal clamping plate 19, which bears againstl theunder side of the axle casing 2,2

against which it is held by means of nuts 20 mounted on the screw-threaded lower ends of the arms of the members 15 and 16.

The members 15 and 16 and theplate 19,

nuts 2O and bolts 17 and nuts 18 form a rigid securing device with which the cylinder 3 is pivotally connected, preferably by a universal joint, as shown. i

The upper end of the piston rod 5 is provided withA a ball head, which is pivotallyV mounted in two sockets providedl one in e'ach of two socket members 22 and 23, each having a laterally extending lug`24, which is secured tothe under side of the horizontal flange of a rightangle member -26, by a vertical bolt 27, which extends through the adjacent lug 24 and the flange 25 and is provided with a nut 28 which bears upon the j topV of the flange 25. The plate 26 has its vertical portion rigidly attached tothe web of the channel bar 1' by horizontal bolts 29,

provided with; nuts 30 which bear against the opposite side ofthe bar 1.

The members 22 and 23 are held bolted together by means oftwo bolts 31, which extend 'through the members 22? and 23 at opposite sides of the ball head 21, and which are provided with nuts 32.

- In the operation of. my invention, when the frame 1 moves downwardly, air below the head 6 and the cylinder 3 resists the .downward movement of the piston head, yas

does the oil 12, incase that the head enters the oil. As the .head moves downwardly the air below the head, and it may bethe oil 12,

passes upwardly through the holes 9, which serve the well known purpose usual to dash-v pot constructions of this character.

The upward movement of the frame 1 is snubbed by the air which is compressed'in the cylinder B above the head. 6, such air ieaais slowly escaping through the holes 13 in the cap 4. The sudden rebound of the frame 1 is thus prevented and the shock to the descending framel is absorbed or eliminated. By having the cylinder 3 and, piston rod :5 pivotally connected to two rigid securing devices, attached respectively tothe axle casing and the frame '1, the dashpot mech--` anism absorbs all-` of the jars and shocks,

which otherwise would be borne by the In ap.

springs which support the frame. plicants construction, the operation is Iwholly independent of the springs which are usually employed to support the frame of the machine. l j

By having the holes 94 extending through the raised portion 8 from the top of the piston head, the `passa, 3;e of air through said l holes does not interfere with and is not inl terfered with by the lubricating oil 11 carried in the depressed portion 10 of the head. By locating the holes 9 out of alinement with the holes 18, oil spurting upwardly lthrough the holes 9. does not pass through the holes 13, but'strikes the under side of the cap 4 and serves to lubricate the piston rod 5 and also the cap 4.

between the piston rod 5 .and the cylinder 3, and frame 1 and axle casing 2 respectively, the frame is permitted to move in any direction freely without having a tend- '.ency to make 'the piston rod 5 or head 6 ball, of two U shaped socket membersem` bracing said ball and adapted to embrace the axle of a vehicle, and a clamping plate which connects the arms of both socket melmbers and is adapted to be clamped tothe ax e.

- In testimony whereof I have signed my name to this specification.

' SWENEY"I\IUNSON.

so' By providing universal joint connections 

